CBSE Class 12 Biology Respiration Notes

Breathing & Exchange of Gases Introduction   • It is a process of oxidation of organic compounds in cell in which energy is released.   • According to scientist G.S. Carter, there are 3 steps in respiration :   1.1 External respiration :…

CBSE Class 12 Biology Sexual Reproduction In Flowering Plants Minds Map

  Important Questions for NCERT Class 12 Biology Sexual Reproduction in Flowering Plants Ques. The role of double fertilisation in angiosperms is to produce (a) cotyledons (b) endocarp (c) endosperm (d) integuments. Answer: C Ques. Double fertilisation is…

CBSE Class 12 Biology Principles Of Inheritance And Variation Minds Map

    Important Questions for NCERT Class 12 Biology Principles of Inheritance and Variation   Ques. What is the genetic disorder in which an individual has an overall masculine development, gynaecomastia and is sterile?(a) Down’s syndrome(b) Turner’s syndrome(c) Klinefelter’s…

CBSE Class 12 Biology Molecular Basis Of Inheritance Minds Map

    Important Questions for NCERT Class 12 Biology Molecular Basis of Inheritance Ques. What would happen if in a gene encoding a polypeptide of 50 amino acids, 25th codon (UAU) is mutated to UAA ? (a) A polypeptide of 24 amino acids will be formed. (b) Two…

CBSE Class 12 Biology Evolution Minds Map

    Important Questions for NCERT Class 12 Biology Evolution   Ques. Convergent evolution is illustrated by (a) rat and dog (b) bacterium and protozoan (c) starfish and cuttle fish (d) dogfish and whale.  Answer: D   Ques. Industrial…

CBSE Class 12 Biology Parthenogenesis Notes

 PARTHENOGENESIS (VIRGIN REPRODUCTION OR VIRGIN BIRTH) Parthenogenesis is the development of an egg into offspring without fertilization. Occurance: It is very common in Rotifers, Aphids, Bees and crustacean. Some vertebrates also reproduced by parthenogenesis. Types:…

CBSE Class 12 Biology Study Guide For All Chapters

Symbols use   Please click the link below to download pdf file for CBSE Class 12 Biology - Study guide for all chapters.

CBSE Class 12 Biology Strategies For Enhancement In Food Production Study Guide

Q A person was born without thymus gland but otherwise normal .Mention any four ways the person is likely to suffer due to its absence . Definitions ANIMAL BREEDING :- Mating or crossing of animals to improve the desirable qualities and yield or produce.…

CBSE Class 12 Biology Strategies For Enhancement In Food Production Notes Set B

 Strategies for Enhancement in Food Production   IMPORTANT scientist and his contribution-Norman E Borlaug ---Developed semi dwarf variety wheat IMPORTANT TERMS 1.MOET - MULTIPLE OVULATION EMBRYO TRANSFER TECHNOLOGY 2.SCP - SINGLE CELL PROTEIN 3. Breed: Group…

CBSE Class 12 Biology Sexual Reproduction In flowering Plants Notes Set C

DOUBLE FERTILIZATION :- Fusion of one male gamete with egg and the other gamete with secondary nucleus (forming 3n endosperm nucleus) FISSION :- Fraction of nucleus with cytoplasm. GOOTEE :- bark of healthy and woody branch for grafting. HELOBIAL :- The mitosis is followed by…

CBSE Class 12 Biology Sexual Reproduction In flowering Plants Notes Set B

  SEXUAL REPRODUCTION IN FLOWERING PLANTS Topics: Flowers Pre- fertilization- structure and events Pollination Fertilization Double fertilization Post fertilization- events Development of seed and fruits Apomixes Polyembryony Types of fruits…